Fuel feeding means



y Jan. 19, 1943. c. Hmm

FUEL FEEDING MEANS Filed Nov. 18, 1941 mdf/F5 mgfz Patented Jan. 19,1943 UNITED STATES PATENT OFFICE FUEL FEEDING MEANS Charles Harth, Alva,Okla.

Application November 18, 1941, Serial No. 419,651

1 Claim. `(Cl. 10S-4) This invention relates generally to motor vehiclesand pertains particularly to fuel feeding mechanism.

The primary object of the present invention is to provide a means inassociation with a fuel t pump such as is commonly used in connectionwith the operation of an internal combustion engine, by which the fuelmay be caused to bypass the pump so that the operator of the engine canfeed gasoline or fuel to the engine carbureter if the pump should go outof action or if it is desired to force more fuel to the carlouretei1than the pump is supplying.

Another object of the invention is to provide in association with amotor vehicle fuel pump, a valved by-pass pipe line around the pumptogether with a hand pump connected with the by-pass line to facilitatedrawing fuel into onev end of the by-pass line and forcing it therefromout of the other end upon the side of the fuel pump nearest thecarbureter so that the carbureter may be fed fuel manually as well as bythe mechanically operated pump or in the event that the pump fails tofunction.

The invention will be best understood from a consideration of thefollowing detailed description taken in connection with the accompanyingdrawing, it being understood, however, that the invention is not to beconsidered as limited by the specific illustration or description butthat such illustration and description constitute a preferred embodimentof the invention.

In the drawing- Fig, 1 is a view partly in elevation and partly insection of the device embodying the present invention the same beingshown in association with a conventionally illustrated fuel pump.

Fig. 2 is a view upon an enlarged scale of portions of the device lyingupon opposite sides of the fuel pump showing the control valves whichform a part thereof.

Referring now more particularly to the drawing the numeral I generallydesignates a conventionally illustrated fuel pump such as is used inassociation with internal combustion engines, the numeral 2 designatingthe fuel supply line leading to the pump and numeral 3 designating' thefuel line leading from the pump to the carbureter, not shown.

In accordance with the present invention there y are provided the twothree-way couplings 4 one of which is connected between the pump. I andthe fuel supply line 2 while the other is connected between the pump andthe supply line 3 which runs to the carbureter, as shown most l55clearly in Fig. 2. Each of these three-way couplings has a laterallyextending nipple 5 and this nipple of the coupling connected with thepipe 2 has connected therewith a lead-off check valve which is indicatedgenerally by the numeral 6 and which comprises a tubular body 'I havingthreadably secured in the lower end thereof the removable centrallyapertured ball seat 8 upon which is located a ball check 9. Spaced fromthe seat 3 in the central part of the tubular body 1 is a spider l0between which and the ball 9 is located the expansion spring II whichfunctions to maintain the ball on its seat. This ball check leads fromor opens away from the pipe line 2 so that fuel can only flow out of thepipe line through the valve 6 but is prevented from returning by thisway.

Upon the opposite side of the pump is located an inflow check valveindicated generally by the numeral Il and having one end threadablysecured in the nipple 5 of the adjacent coupling 4. In this lower end ofthe tube I2 which forms a part of the valve structure II there issecured a spider I3 and in spaced relation with the spider Y there isformed across the tube the ball check seat I4 upon the underside ofwhich is located a ball check I5. Between the ball I5 and the spider I3is an expansion spring I6 which normally urges the ball upwardly ontoits seat. This check valve, as will be readily apparent, functions topermit fuel to flow through into the pipe 3 but prevents the fuel frompassing outwardly through the tube from'this pipe.

The upper end of each of the check valves 'I is suitably interiorlyscrew threaded to receive a sleeve nut I'l and the valves are coupledtogether by a by-pass conduit which is indicated generally by I 8. Thisby-pass conduit comprises a short tube I9, one end of which isr coupledby means of the sleeve nut I'I with the upper end of the check valve 6,an L-shaped tube 20 which has one end coupled by means of the sleeve nutI'I with the check valve II, and three-way coupling 2I, one arm of whichis connected by the sleeve nut 22 with the tube I9 while a second arm isconnected by a similar sleeve nut 23 with the other end of the tube 20.Thus these three units I9, 2U and 2| form a by-pass conduit around thepump I.

The third arm of the coupling 2| has connected therewith by means of thesleeve nut 24, an end of a pipe 25 and this pipe is run to a convenientlocation within the vehicle in which the device is installed and maypass through the dashboard 26 toward the instrument panel 21.

Supported upon the back of the instrument panel is a piston pump whichis indicated generally by the numeral 28. This comprises a cylinder 2i)which at its forward end is provided with a suitable coupling 30 tofacilitate connection of the pipe 25 therewith. At its forward end thecylinder is closed by a cap 3l which has an elongated tubular stem 32which extends through a suitable aperture in the instrument panel andreceives upon the two sides of the panel the lock nuts 33 which areemployed to rmly secure the head of the piston pump to the panel.

Within the cylinder 23 is a piston 34 having a stem 35 which extendsthrough the tubular stem 32 and carries a head or button 35 upon itsforward end by which the reciprocation of the piston in the cylinder iseffected.

From the foregoing it will be readily apparent that when the piston 29of the pump 28 is pulled out or toward the panel 2'! a reduced pressurewill he created in the pipes le, 2&3 and 25. The reduction in pressurewill merely cause the ball of the valve il to seat more iirrnly but willpermit the hall of the valve G to rise from its seat and thus draw fuelfrom the line 2 into the conduit IB. Then reversely shifting the piston35 such fuel will be ejected through the pipe 2] then through the inletcheck valve Il to the fuel pipe line 3 from which it will pass to thecarbureter of the machine. Thus it will be seen that by this device theoperator of the vehicle can force ad dtional fuel to the carbureter ifthe pump is not supplying a sumcient quantity or if the pump should failentirely the carbureter may be'kept supplied manually so as to keep themachine running until it can be gotten to a place where necessaryrepairs may be made upon the pump.

What is claimed is:

The combination with a fuel pump having a fuel supply line leading intoone side and a carbureter supply line leading from the other side, of acheck valve connected With said fuel line outside and independently ofthe pump structure and opening away from the same, a second check valveconnected with the carbureter line outside and independently of the pumpstructure and opening toward the same. said valves being out of the lineof ow of fuel to and from the pump, a conduit leading from the rst checkvalve to the second check valve across the pump, a pipe having one endopening into said conduit between the check valves, and a hand pumpcomprising a cylinder having the other end of said last pipe connectedtherewith and a piston in the cylinder for eiTecting the drawing of fuelpast the first valve into the conduit and the ejection of the fuel fromthe conduit past the second valve into the carburetor pipe line.

CHARLES HARTH.

